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In this article, cross‐polarized reflection from a periodic array of metal‐backed anisotropic units is reduced in order to achieve a compact ultrathin absorber. Using a frequency selective surface (FSS) as middle layer (ML), the peak absorptivity is improved from 23.75% to 73.45%, while its thickness and full width at half maxima (FWHM) bandwidth is kept unaltered. The absorption characteristics of...
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